Ground grade support device



FIG. 1 is a perspective view of the ground grade support device of the claimed design;

FIG. 2 is a front view of the ground grade support device of FIG. 1;

FIG. 3 is a top view of the ground grade support device of FIG. 1; and,

FIG. 4 is a bottom view of the ground grade support device of FIG. 1. 

CLAIM I claim the ornamental design for a ground grade support device, as shown and described. 